use super::Entity;
use super::component::{Component, ComponentStorage};

pub trait ComponentBundle<W> {
    fn insert(self, world: &mut W, entity: Entity);
}

macro_rules! impl_bundle_tuple {
    ($($T:ident),+) => {
        impl<W, $($T),+> ComponentBundle<W> for ($($T,)+)
        where
            $(
                $T: Component,
                W: ComponentStorage<$T>,
            )+
        {
            #[allow(non_snake_case)]
            fn insert(self, world: &mut W, entity: Entity) {
                let ($($T,)+) = self;

                $(
                    world.insert(entity, $T);
                )+
            }
        }
    };
}

impl_bundle_tuple!(A);
impl_bundle_tuple!(A, B);
impl_bundle_tuple!(A, B, C);
impl_bundle_tuple!(A, B, C, D);
impl_bundle_tuple!(A, B, C, D, E);
impl_bundle_tuple!(A, B, C, D, E, F);